Oracle How to attach a detached database

How to detach (unplug) an PDB database

sqlplus / as sysdba
alter pluggable database pdb1 close immediate;
alter pluggable database pdb1 unplug into '/u01/app/oracle/oradata/pdb1.xml';
drop pluggable database pdb1 keep datafiles;
show pdbs

How to attach (plugin) a PDB database

sqlplus / as sysdba

set serveroutput on 

DECLARE
   compatible BOOLEAN := FALSE;
BEGIN   
   compatible := DBMS_PDB.CHECK_PLUG_COMPATIBILITY(
        pdb_descr_file => '/u01/app/oracle/oradata/pdb1.xml');
   if compatible then
      DBMS_OUTPUT.PUT_LINE('Is PDB compatible? YES');
   else DBMS_OUTPUT.PUT_LINE('Is PDB compatible? NO');
   end if;
END;
/

Attach PDB with NOCOPY

create pluggable database pdb_new using '/u01/app/oracle/oradata/pdb1.xml' 
NOCOPY 
TEMPFILE REUSE;

Attach PDB with COPY

$ mkdir -p /u01/app/oracle/oradata/cdbnew/pdb_new
$ sqlplus / as sysdba
create pluggable database pdb_new using '/u01/app/oracle/oradata/pdb1.xml' 
COPY
FILE_NAME_CONVERT('/u01/app/oracle/oradata/cdb/pdb1','/u01/app/oracle/oradata/cdbnew/pdb_new');